The Candyfloss Kid demonstrates how to quickly add external or internal meshes to fuse to your voxel sculpt meshes by using the merge function in 3DCoat.

How to quickly add external or internal meshes to fuse to your voxel sculpt meshes by merging “on pen”

The Candyfloss Kid also notes that the video also covers how to quickly add meshes to the 3DCoat Model library and use them with the “On Pen” Merge option, and also looks at how to add meshes to your splines library just as quickly.